EP0227164A2 - Système de transmission à intégration de services d'informations numériques avec des dispositifs pour la transmission simultanée de signaux à large bande et à bande étroite - Google Patents

Système de transmission à intégration de services d'informations numériques avec des dispositifs pour la transmission simultanée de signaux à large bande et à bande étroite Download PDF

Info

Publication number
EP0227164A2
EP0227164A2 EP86202172A EP86202172A EP0227164A2 EP 0227164 A2 EP0227164 A2 EP 0227164A2 EP 86202172 A EP86202172 A EP 86202172A EP 86202172 A EP86202172 A EP 86202172A EP 0227164 A2 EP0227164 A2 EP 0227164A2
Authority
EP
European Patent Office
Prior art keywords
signal
amplitude
narrowband
broadband
transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86202172A
Other languages
German (de)
English (en)
Other versions
EP0227164A3 (fr
Inventor
Wolfgang Dipl.-Ing. Krick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Corporate Intellectual Property GmbH
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Corporate Intellectual Property GmbH, Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP0227164A2 publication Critical patent/EP0227164A2/fr
Publication of EP0227164A3 publication Critical patent/EP0227164A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/04—Channels characterised by the type of signal the signals being represented by different amplitudes or polarities, e.g. quadriplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J7/00—Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels

Definitions

  • the invention relates to an integrated service digital message transmission system according to the preamble of patent claim 1.
  • the subscriber signaling required for both B channels is transmitted via the D channel.
  • This subscriber signaling includes the transmission of general information between connected subscriber terminals and the network, for example about existing and unresolved external connection requests, fee information, and the transmission of information for service-specific handling of the connections on the B channels, including B channels including the control of the connection establishment with changing terminal configuration (subscriber stations with several devices on one connection).
  • the subscriber stations in ISDN are connected to a so-called network termination NT, which is connected via the connecting line to a line termination LT of the exchange.
  • Line termination LT and network termination NT take over the transmission-related tasks of sending and receiving the narrowband signals with a net bit rate of 144 kbit / s, with which the tasks of clock supply and synchronization, error limitation by looping and remote feeding are connected.
  • Up to eight end devices can be connected to the SO interface in ISDN: They can access the D channel independently of each other.
  • CCITT recommendation I. 430 stipulates that first all D- from the terminals to the network termination via the D channel
  • bits are individually sent back to the terminals in a special D-echo channel via the SO interface.
  • the electrical properties of the SO interface are selected so that a logical "0" always dominates when different terminals simultaneously send a logical "0" and a logical "1" in the D channel (wired-or).
  • a future broadband ISDN with preferably an optical subscriber line
  • services with higher transmission bit rates e.g. moving picture services
  • this integration is limited to services that can manage with a maximum of two 64 kbit / s-B channels, there are no restrictions regarding the capacity of the connecting line.
  • an access procedure must be defined with regard to the integration of broadband services on the subscriber line. If the broadband terminal is to be accessed using the access procedure specified in CCITT recommendation I. 430, a possible solution for this is to connect the broadband terminal to the network termination NT via a multiple line.
  • the broadband terminal is connected to the SO bus like a narrowband terminal and is connected to the network termination NT in parallel via a broadband connection (on which only the broadband information is transmitted).
  • a broadband connection on which only the broadband information is transmitted.
  • a service-integrated, digital transmission system in which a low-rate and a high-rate signal are superimposed in separate frequencies on the transmission side areas of responsibility.
  • the received sum signal is broken down into the low-rate and the high-rate signal by frequency filtering.
  • Steep-flanked LC filters are required for the frequency separation of the low-rate and high-rate signals, the frequency spectra of the low-rate and high-rate signals having to be sufficiently far apart.
  • the service-integrated digital transmission system known from EP-B1 0 053 236 has the disadvantage that intermodulation products occurring during transmission cannot be eliminated by means of frequency filtering due to non-linearities, and the transmission quality is thereby impaired.
  • EP-A1 0 135 164 discloses a transmission system for digital signals of high step speed with additional signal transmission, in which the low-rate signal is phase-superimposed on a high-rate signal by modulating the clock phase of the high-rate signal with the low-rate signal.
  • the high-rate signal must be available - at least as a clock signal - so that limited operation to save power consumption, namely only that of the narrowband channel, is not possible if the local power supply and backup battery supply of the subscriber-side transmission devices fail.
  • the invention is based on the object of designing an integrated service digital message transmission system in such a way that a simple and less interference-prone combination of the narrowband and broadband signals into a sum signal is achieved and that the splitting of the sum signal into narrowband and broadband signal can be carried out in a simple manner, so that in particular access to the signaling channel contained in the narrowband signal in accordance with the access method defined in CCITT recommendation 1.430 for narrowband terminals also for broadband terminals with low Effort can be made.
  • the integrated service digital message transmission system has the advantage that the low-rate signal can also be transmitted without the high-rate signal. This also makes emergency operation possible, for which components which are easier to implement and use less power are required than in an operating mode with constant transmission of a high-rate signal, such as in time-division multiplex transmission.
  • the integrated service digital message transmission system according to the invention has the advantage that when the subscriber-side transmission devices are no longer fed from the local power supply network but from a buffer battery, only the modules required for maintaining the telephone service remain in operation and the others, in order to save power Assemblies are switched off.
  • Another advantage of the integrated service digital communication system according to the invention compared to a transmission system in which the The low-rate and the high-rate signal must be recorded using the time-division multiplex method or using a phase modulation of the broadband signal clock so that the line code used is used to transmit the high-rate signal at the network locations which relate to access to the signaling channel (for example in the NT ), does not have to be resolved, which can save the otherwise necessary effort for repeated decoding / coding operations for demultiplexing / multiplexing.
  • the subscriber-side transmission devices can be implemented with simple and low-power components.
  • the narrowband signal present in the transmission signal can advantageously also be used as a pilot signal for the gain control.
  • Fig. 1 shows a block diagram of the integrated service digital communication system according to the invention with the facilities necessary for understanding the invention.
  • the low-rate signal b l is fed to an interface circuit S1 and the high-rate signal b 2 to an interface circuit S2.
  • the output signals of the interface circuits S1 and S2 are superimposed on one another with a weighting dependent on the bit rate ratio in such a way that a sum signal ai which is multi-level in amplitude is produced.
  • the form of superimposing two digital signals with different bit rates is also known as spectrum multiplexing.
  • the transmission-side summary of the narrowband and broadband signals b 1 and b 2 is carried out with a weighting gi which is dependent on the bit rate ratio, in accordance with the equation
  • This form of spectrum multiplex leads to a modular design concept, in which the transmission technology can be easily supplemented with a broadband channel for a broadband subscriber line using the functional structure already available for the narrowband subscriber line.
  • a broadband channel for the broadband channel, the bit rate of which is significantly higher than that of the first hierarchical level (2 Mbit / s), common access control to a signaling channel is provided in the broadband terminal as well as in the narrowband terminal.
  • an emergency operating solution reduction in power consumption
  • a narrowband connection that initiates the broadband connection change of service
  • narrowband basic operation is made possible in the integrated digital communication system.
  • a continuous line coding for the high-rate signal from the broadband terminal to the exchange possibly also through the broadband switching network.
  • a laser L is used in the transmitter S, which laser is driven by a current I formed additively from the two signals b 1 and b 2 .
  • a control R is provided in the transmitter S, by means of which a bias current and modulation current control is carried out for setting the operating point of the laser L and which has setpoints which are dependent on the operating mode.
  • an operational monitoring BÜS is provided in the transmitter S. If the slope in the laser characteristic changes, the gain of the sum signal is controlled by means of the device UV on the basis of the narrowband signal b l serving as a pilot signal in such a way that the amplitude fluctuation ⁇ P of the transmission signal P remains constant.
  • a shift in the laser characteristic curve LK (FIG.
  • the output signal P of the laser L is fed to a receiver E via an optical fiber LL.
  • the optical signal is converted into an electrical sum signal by means of a photodetector PE arranged at the input of the receiver E.
  • a photodetector PE arranged at the input of the receiver E.
  • the latter is supplied on the one hand to an amplitude envelope detector HD and on the other hand via an amplifier VE1 to an amplitude limiter AB.
  • Such a combination and separation of the low-rate and high-rate signals b l , b 2 does not require a synchronous clock relationship of the two signals to one another and the two signals b 1 , b 2 can be transmitted with overlapping frequency spectra, since the separation is not carried out by frequency selection but by amplitude selection.
  • all that is required is that the binary characters of the high-rate signal b 2 are statistically balanced within the step duration of the low-rate signal b 1 , so that the high-rate signal b 2 as a carrier in the Envelope detection of the low-rate signal b 1 acts.
  • a suitable binary line code for the high-rate signal b 2 is, for example, the CMI code.
  • an operational monitoring BÜE is provided in the receiver E, by means of which, by forming a difference in the differential stage D of the output signal of the envelope detector HD and the output signal of a low-pass filter TPE forming the mean value, a criterion characterizing the operating case for the presence of the broadband signal b 2 can be derived is.
  • the cut-off frequency of the low-pass filter TPE corresponds to the Nyquist frequency of the narrowband signal b 1 .
  • FIG. 2 shows the four-stage sum signal ai which arises when the two signals b 1 and b 2 are superimposed.
  • Ao is to be understood as the bias current I 0 to be set for an optical transmitter.
  • the amplitude level a l arises when only the low-rate signal b 1 is present.
  • the amplitude level a 2 arises when only the high-rate signal b 2 is present.
  • the amplitude level a 3 arises when both the low-rate signal b 1 and the high-rate signal b 2 are present and are additively superimposed on one another.
  • FIG. 3 shows the time characteristic of the laser current I and the laser light power P in the emergency operating case (operation I) and in the normal operating case (operation II) on the basis of the laser characteristic curve LK.
  • the laser light power P generated is non-linearly linked to the laser current I. Changes in the laser characteristic curve LK can be compensated for by means of the control R already explained using the control variables ⁇ P and P.
  • the modulated light output emitted by the laser L is regulated with the operating point setting by the bias current I 0 and by the amplification of the modulation current Im to an average power P required for the transmission for the high-rate signal b 2 and to a peak power variation AP for the low-rate signal b l .
  • the superimposition of the low-rate and high-rate signals b 1 and b 2 in normal operation is illustrated in FIG. 3 by the thick and thin lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)
EP86202172A 1985-12-16 1986-12-04 Système de transmission à intégration de services d'informations numériques avec des dispositifs pour la transmission simultanée de signaux à large bande et à bande étroite Withdrawn EP0227164A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3544393 1985-12-16
DE19853544393 DE3544393A1 (de) 1985-12-16 1985-12-16 Diensteintegrierendes, digitales nachrichtenuebertragungssystem mit einrichtungen zur gemeinsamen uebertragung von schmalband- und breitbandsignalen

Publications (2)

Publication Number Publication Date
EP0227164A2 true EP0227164A2 (fr) 1987-07-01
EP0227164A3 EP0227164A3 (fr) 1989-03-15

Family

ID=6288530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86202172A Withdrawn EP0227164A3 (fr) 1985-12-16 1986-12-04 Système de transmission à intégration de services d'informations numériques avec des dispositifs pour la transmission simultanée de signaux à large bande et à bande étroite

Country Status (4)

Country Link
US (1) US4763326A (fr)
EP (1) EP0227164A3 (fr)
JP (1) JPS62144431A (fr)
DE (1) DE3544393A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682239A1 (fr) * 1991-10-04 1993-04-09 Cit Alcatel Systeme de transmission bidirectionnelle, notamment par fibre optique, avec une porteuse unique pour les deux sens de transmission.
WO1996029793A3 (fr) * 1995-03-20 1996-11-28 Raychem Corp Multiplexeur de signaux numeriques multiples
US6282204B1 (en) 1997-12-19 2001-08-28 Terayon Communication Systems, Inc. ISDN plus voice multiplexer system

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933929A (en) * 1987-06-29 1990-06-12 Nec Corporation Wavelength multiplexed optical transmitter for generating constant-amplitude angle-modulated beams to eliminate phase noise in adjacent transmission channels
US4885747A (en) * 1988-02-17 1989-12-05 International Business Machines Corp. Broadband and baseband LAN
FR2630871B1 (fr) * 1988-04-29 1994-03-18 Alcatel Cit Procede et dispositif d'adjonction et de separation d'un canal numerique a bas debit au canal numerique a haut debit d'une liaison de transmission
JPH0279542A (ja) * 1988-09-14 1990-03-20 Fujitsu Ltd 副信号伝送方式
US5062154A (en) * 1989-03-03 1991-10-29 The United States Of America As Represented By The Secretary Of The Navy Mid range UV communications
GB8906093D0 (en) * 1989-03-16 1989-04-26 British Telecomm Optical transmission system
WO1991006161A1 (fr) * 1989-10-13 1991-05-02 Codenoll Technology Corporation Procede et appareil de communication simultanee d'une pluralite de signaux
US5303229A (en) * 1991-07-31 1994-04-12 Alcatel Network Systems, Inc. Optical network unit
US5528283A (en) * 1992-06-22 1996-06-18 Alcatel Network Systems, Inc. Switched video distribution apparatus
JPH0746224A (ja) * 1992-10-09 1995-02-14 Philips Electron Nv 送信システム及び受信機
DE4341408A1 (de) * 1993-12-04 1995-06-08 Sel Alcatel Ag Optisches System zur Übertragung eines Mehrstufensignals
US5499244A (en) * 1994-05-02 1996-03-12 At&T Corp. Packet data reciever with sampled data output and background light cancellation
DE4438942A1 (de) * 1994-10-31 1996-05-02 Sel Alcatel Ag Optisches Nachrichtenübertragungssystem für Kabelfernsehsignale und für teilnehmerindividuelle Signale
US5901151A (en) * 1996-02-27 1999-05-04 Data General Corporation System for orthogonal signal multiplexing
DE19713952C1 (de) * 1997-04-04 1998-10-15 Siemens Ag Verfahren zur Übertragung von Zusatzdatensignalen und einem Nutzdatensignal über optische Verbindungen
DE19730621A1 (de) * 1997-07-17 1999-01-21 Alsthom Cge Alcatel Verfahren zum Übertragen von Daten auf einer ISDN-Anschlußleitung, sowie Leitungsabschlußeinheit, Vermittlungsstelle, Netzabschlußeinheit und Datenendgerät dafür
US6266320B1 (en) * 1998-04-08 2001-07-24 Telefonaktiebolaget Lm Ericsson (Publ) Amplitude limitation in CDMA system
US6275509B1 (en) 1998-05-14 2001-08-14 The United States Of America As Represented By The Secretary Of The Navy Masked signal transceiver
WO2001043318A1 (fr) * 1999-12-09 2001-06-14 Photonixnet Kabushiki Kaisha Emetteur/recepteur optique
KR100405023B1 (ko) * 2000-12-05 2003-11-07 옵티시스 주식회사 유니버셜 직렬 버스용 광통신 인터페이스 모듈
US8175020B2 (en) * 2004-01-30 2012-05-08 Level 3 Communications, Llc Method for the transmission and distribution of digital television signals
US7630631B2 (en) * 2004-04-14 2009-12-08 Finisar Corporation Out-of-band data communication between network transceivers
DE602008003014D1 (de) * 2008-06-13 2010-11-25 Alcatel Lucent Verfahren zur Übertragung von zwei übereinander gelagerten digitalen Signalen und entsprechendes Übertragungssystem
WO2013055782A2 (fr) 2011-10-10 2013-04-18 Tyco Electronics Corporation Système de communication de données en radiofréquences à large bande utilisant un câblage par paire torsadée
JP6141025B2 (ja) 2013-01-15 2017-06-07 株式会社クボタ モーアのカッターブレード及びモーア
EP2992628B1 (fr) 2013-04-30 2018-10-31 Silicon Line GmbH Agencement de circuit et procédé de réception de signaux optiques
WO2015038415A1 (fr) * 2013-09-13 2015-03-19 Corning Optical Communications LLC Procédés, circuits et ensembles de câble optique pour la transmission optique de données à haute vitesse et de données à basse vitesse
JP6988604B2 (ja) * 2018-03-16 2022-01-05 日本電信電話株式会社 光変復調方法、光通信システム、光送信装置及び光受信装置
US10998982B2 (en) 2019-04-18 2021-05-04 Microsoft Technology Licensing, Llc Transmitter for throughput increases for optical communications
US10873393B2 (en) 2019-04-18 2020-12-22 Microsoft Technology Licensing, Llc Receiver training for throughput increases in optical communications
US10911152B2 (en) * 2019-04-18 2021-02-02 Microsoft Technology Licensing, Llc Power-based decoding of data received over an optical communication path
US10897315B2 (en) * 2019-04-18 2021-01-19 Microsoft Technology Licensing, Llc Power-based decoding of data received over an optical communication path
US10938485B2 (en) 2019-04-18 2021-03-02 Microsoft Technology Licensing, Llc Error control coding with dynamic ranges
US10862591B1 (en) 2019-04-18 2020-12-08 Microsoft Technology Licensing, Llc Unequal decision regions for throughput increases for optical communications
US10951342B2 (en) 2019-04-18 2021-03-16 Microsoft Technology Licensing, Llc Throughput increases for optical communications
US10911155B2 (en) 2019-04-18 2021-02-02 Microsoft Technology Licensing, Llc System for throughput increases for optical communications
US11018776B2 (en) 2019-04-18 2021-05-25 Microsoft Technology Licensing, Llc Power-based decoding of data received over an optical communication path

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1495929A (en) * 1973-11-24 1977-12-21 British Aircraft Corp Ltd Communication systems
US4328591A (en) * 1979-04-23 1982-05-04 Baghdady Elie J Method and apparatus for signal detection, separation and suppression
DE2922418C2 (de) * 1979-06-01 1981-12-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Dienstintegriertes Nachrichtenübertragungs- und Vermittlungssystem für Ton, Bild und Daten
DE3044657A1 (de) * 1980-11-27 1982-07-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "dienstintegriertes digitales uebertragungssystem"
DE3044605A1 (de) * 1980-11-27 1982-06-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "dienstintegriertes digitales uebertragungssystem"
DE3137497A1 (de) * 1981-09-21 1983-04-07 Siemens Ag Optisches uebertragungssystem fuer hochfrequente digitale signale
GB2111352A (en) * 1981-12-01 1983-06-29 Plessey Co Plc Improvements in or relating to radio communication systems

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682239A1 (fr) * 1991-10-04 1993-04-09 Cit Alcatel Systeme de transmission bidirectionnelle, notamment par fibre optique, avec une porteuse unique pour les deux sens de transmission.
EP0541409A1 (fr) * 1991-10-04 1993-05-12 Alcatel Cit Système de transmission bidirectionnelle, notamment par fibre optique, avec une porteuse unique pour les deux sens de transmission
US5408350A (en) * 1991-10-04 1995-04-18 Alcatel Cit Bidirectional transmission system, especially one using optical fiber, employing a single carrier for both transmission directions
WO1996029793A3 (fr) * 1995-03-20 1996-11-28 Raychem Corp Multiplexeur de signaux numeriques multiples
US5668814A (en) * 1995-03-20 1997-09-16 Raychem Corporation Dual DDS data multiplexer
US5978390A (en) * 1995-03-20 1999-11-02 Raychem Corporation Dual DDS data multiplexer
US6282204B1 (en) 1997-12-19 2001-08-28 Terayon Communication Systems, Inc. ISDN plus voice multiplexer system

Also Published As

Publication number Publication date
DE3544393A1 (de) 1987-06-19
JPS62144431A (ja) 1987-06-27
EP0227164A3 (fr) 1989-03-15
US4763326A (en) 1988-08-09

Similar Documents

Publication Publication Date Title
EP0227164A2 (fr) Système de transmission à intégration de services d'informations numériques avec des dispositifs pour la transmission simultanée de signaux à large bande et à bande étroite
DE69733692T2 (de) Verfahren und system zur kompensation gestohlener bits zugeordnet zu einem empfänger oder codec
EP0053236B1 (fr) Système de transmission numérique à service intégré
DE3237168C2 (de) Telefonanlage zur Übermittlung von Sprach- und Datensignalen
DE69318620T2 (de) Optisches System zum Anschluss der Teilnehmereinrichtungen an eine Vermittlungszentrale eines Telekommunikationsnetzes mit interaktiven und nichtinteraktiven Diensten
EP0709978B1 (fr) Système optique de transmission pour des signaux de télévision par câble et pour des signaux d'abonnés individuels
DE4344913A1 (de) Einrichtung und Verfahren zum gleichzeitigen Übertragen von Steuerinformationen mit Sprach- und Dateninformationen über eine Leitung eines Telefon-Vermittlungsnetzwerkes
WO2002049176A1 (fr) Dispositif et procede permettant de transmettre des donnees de transmission numeriques
DE3990712C2 (de) Schnittstelleneinheit
EP0386482B1 (fr) Système de transmission optique pour connexion d'abonné
EP0176015B1 (fr) Procédé pour la transmission d'informations supplémentaires au moyen d'un canal numérique auxiliaire et utilisation du procédé
EP0386466B1 (fr) Système optique de transmission d'information dans la zone d'abonné
DE3632047C2 (de) Optisches Nachrichtenübertragungssystem für Schmalband- und Breitband-Nachrichtensignale
DE4226838B4 (de) Optisches, breitbandiges Nachrichtenübertragungssystem für Kommunikations- und Verteildienste
DE69431786T2 (de) Übertragungsnetz mit Vielfachzugriff und Unterträger
DE2111706C3 (de) Schaltungsanordnung für eine Fernsprech-Vermittlungsanlage mit Pulsphasenmodulation
DE2056769C3 (de) Sende-Empfangsstation in einem Radio-Telef onienetz mit selektivem Anruf
DE3232599A1 (de) System zur uebertragung digitaler signale
DE69323694T2 (de) Übertragungsnetz mit Vielfachzugriff
EP0126413B1 (fr) Système de télécommunication à la fois pour trafic en mode-circuit et pour trafic en mode-paquet
EP0143268A2 (fr) Procédé et dispositif pour intercaler un signal numérique binaire à bande étroite dans, ou pour extraire ce signal à bande étroite d'un signal à multiplexage dans le temps
AT390857B (de) Schaltungsanordnung zum vermitteln von datensignalen unterschiedlicher datensignalraten in einer datenvermittlungsanlage
EP0990323B1 (fr) Procede de transmission optique d'informations de signalisation et de commande dans des reseaux optiques a multiplexage en longueur d'onde
DE19817007C2 (de) Verfahren zur Nutzung digitaler Datennetze zum Zwecke der Bandbreitenreduktion bei der Übertragung von Daten über Sprachverbindungswege
EP0995286A1 (fr) Procedure de transmission d'informations de signalisation et de commande pour reseaux a multiplexage en longueur d'onde destines a la transmission d'informations optique par fibres

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR GB IT LI SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: N.V. PHILIPS' GLOEILAMPENFABRIEKEN

Owner name: PHILIPS PATENTVERWALTUNG GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19890905

17Q First examination report despatched

Effective date: 19910729

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRICK, WOLFGANG, DIPL.-ING.